6 In a subject who forcibly expires against a clos

[Editor]

6 In a subject who forcibly expires against a closed glottis

a Right ventricular output increases
b Left ventricular output decreases
c Bradycardia will occur
d Coronary blood flow will increase
e Hypertension will occur

mark wrote:

6 In a subject who forcibly expires against a closed glottis

a Right ventricular output increases
b Left ventricular output decreases
c Bradycardia will occur
d Coronary blood flow will increase
e Hypertension will occur

..


A. F
B.F
C.T
D.F
C.F


This is valsava\'s manoeure;
shows 4 phases;
phase1: increase in intrathoracic pressure expells blood from thoracic vessels,
phase2:decrease in BP,due to reduction in venous return, causes activation of baroreceptor reflex causing tacycardia and vasoconstriction, rasing BP towards normal,
phase3:further drop in BP,as intrathoracic pressure suddenly drops with pooling of blood in pulmonary vessels.
phase4vershoot, as compensatory mechanism continues to operates with venous return restored.increased BP causes bradycardia.

[jijindr]

d) there is increased sympathetic stimulation and increase in coronary blood flow........it is how i understand